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  1. /*
  2.  * Copyright (C) 2001-2004 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #include <arch/interrupt.h>
  30. #include <print.h>
  31. #include <debug.h>
  32. #include <panic.h>
  33. #include <arch/i8259.h>
  34. #include <func.h>
  35. #include <cpu.h>
  36. #include <arch/asm.h>
  37. #include <mm/tlb.h>
  38. #include <arch.h>
  39. #include <symtab.h>
  40.  
  41. /*
  42.  * Interrupt and exception dispatching.
  43.  */
  44.  
  45. static iroutine ivt[IVT_ITEMS];
  46.  
  47. void (* disable_irqs_function)(__u16 irqmask) = NULL;
  48. void (* enable_irqs_function)(__u16 irqmask) = NULL;
  49. void (* eoi_function)(void) = NULL;
  50.  
  51. #define PRINT_INFO_ERRCODE(x) { \
  52.     char *symbol = get_symtab_entry(stack[1]); \
  53.     if (!symbol) \
  54.         symbol = ""; \
  55.     printf("----------------EXCEPTION OCCURED----------------\n"); \
  56.     printf("%%eip: %X (%s)\n",x[1],symbol); \
  57.     printf("ERROR_WORD=%X\n", x[0]); \
  58.     printf("%%cs=%X,flags=%X\n", x[2], x[3]); \
  59.     printf("%%eax=%X, %%ebx=%X, %%ecx=%X, %%edx=%X\n",\
  60.            x[-2],x[-5],x[-3],x[-4]); \
  61.     printf("%%esi=%X, %%edi=%X, %%ebp=%X, %%esp=%X\n",\
  62.            x[-8],x[-9],x[-1],x); \
  63.     printf("stack: %X, %X, %X, %X\n", x[4], x[5], x[6], x[7]); \
  64.     printf("       %X, %X, %X, %X\n", x[8], x[9], x[10], x[11]); \
  65.         }
  66.  
  67. iroutine trap_register(__u8 n, iroutine f)
  68. {
  69.     ASSERT(n < IVT_ITEMS);
  70.    
  71.     iroutine old;
  72.    
  73.     old = ivt[n];
  74.     ivt[n] = f;
  75.    
  76.     return old;
  77. }
  78.  
  79. /*
  80.  * Called directly from the assembler code.
  81.  * CPU is cpu_priority_high().
  82.  */
  83. void trap_dispatcher(__u8 n, __native stack[])
  84. {
  85.     ASSERT(n < IVT_ITEMS);
  86.    
  87.     ivt[n](n, stack);
  88. }
  89.  
  90. void null_interrupt(__u8 n, __native stack[])
  91. {
  92.     printf("int %d: null_interrupt\n", n);
  93.     printf("stack: %L, %L, %L, %L\n", stack[0], stack[1], stack[2], stack[3]);
  94.     panic("unserviced interrupt\n");
  95. }
  96.  
  97. void gp_fault(__u8 n, __native stack[])
  98. {
  99.     PRINT_INFO_ERRCODE(stack);
  100.     panic("general protection fault\n");
  101. }
  102.  
  103. void ss_fault(__u8 n, __native stack[])
  104. {
  105.     PRINT_INFO_ERRCODE(stack);
  106.     panic("stack fault\n");
  107. }
  108.  
  109.  
  110. void nm_fault(__u8 n, __native stack[])
  111. {
  112.     reset_TS_flag();
  113.     if ((CPU->fpu_owner)!=NULL) {  
  114.         fpu_lazy_context_save(&((CPU->fpu_owner)->saved_fpu_context));
  115.         (CPU->fpu_owner)->fpu_context_engaged=0; /* don't prevent migration */
  116.     }
  117.     if(THREAD->fpu_context_exists) fpu_lazy_context_restore(&(THREAD->saved_fpu_context));
  118.     else {fpu_init();THREAD->fpu_context_exists=1;}
  119.     CPU->fpu_owner=THREAD;
  120. }
  121.  
  122.  
  123.  
  124. void page_fault(__u8 n, __native stack[])
  125. {
  126.     PRINT_INFO_ERRCODE(stack);
  127.     printf("page fault address: %X\n", read_cr2());
  128.     panic("page fault\n");
  129. }
  130.  
  131. void syscall(__u8 n, __native stack[])
  132. {
  133.     printf("cpu%d: syscall\n", CPU->id);
  134.     thread_usleep(1000);
  135. }
  136.  
  137. void tlb_shootdown_ipi(__u8 n, __native stack[])
  138. {
  139.     trap_virtual_eoi();
  140.     tlb_shootdown_ipi_recv();
  141. }
  142.  
  143. void wakeup_ipi(__u8 n, __native stack[])
  144. {
  145.     trap_virtual_eoi();
  146. }
  147.  
  148. void trap_virtual_enable_irqs(__u16 irqmask)
  149. {
  150.     if (enable_irqs_function)
  151.         enable_irqs_function(irqmask);
  152.     else
  153.         panic("no enable_irqs_function\n");
  154. }
  155.  
  156. void trap_virtual_disable_irqs(__u16 irqmask)
  157. {
  158.     if (disable_irqs_function)
  159.         disable_irqs_function(irqmask);
  160.     else
  161.         panic("no disable_irqs_function\n");
  162. }
  163.  
  164. void trap_virtual_eoi(void)
  165. {
  166.     if (eoi_function)
  167.         eoi_function();
  168.     else
  169.         panic("no eoi_function\n");
  170.  
  171. }
  172.